Intelligent policy and charging rule function (PCRF) restoration

A first device implementing a policy and charging rule function (PCRF) associated with an evolved packet core network, the first device comprising:

• a memory;
• and
• one or more processors, operatively connected to the memory, to:
• receive a first update request from a second device implementing a packet data network gateway (PGW) associated with the evolved packet core network;
• the first update request being associated with a Gx communication session previously provided between the first device and the second device,
• the first update request being generated based on a request for communication provided to the evolved packet core network;
• generate an update answer based on being unable to identify the Gx communication session associated with the first update request,
• the update answer including a code requesting that the Gx communication session be restored between the first device and the second device;
• receive, based on the code, a second update request from the second device,
• the second update request including session information associated with the Gx communication session previously provided between the first device and the second device;
• and
• restore, based on the session information, the Gx communication session previously provided between the first device and the second device to establish a restored communication session.

A method, comprising:

• receiving, by a first device implementing a policy and charging rule function (PCRF) associated with an evolved packet core network, an authentication/authorization request from a second device associated with an Internet protocol Multimedia Subsystem (IMS) network,
• the authentication/authorization request being associated with a Gx communication session previously provided between the first device and a third device implementing a packet data network gateway (PGW) associated with the evolved packet core network, and
• the authentication/authorization request being generated based on a voice request or a video request;
• attempting, by the first device, to identify the Gx communication session based on the authentication/authorization request;
• providing, by the first device and to the second device, an authentication/authorization answer, based on the authentication/authorization request, when the Gx communication session is not identified;
• providing, by the first device and when the Gx communication session is not identified, a reauthorization request to the third device;
• receiving, by the first device and based on the reauthorization request, an update request from the third device,
• the update request including session information associated with the Gx communication session previously provided between the first device and the third device;
• and
• restoring, by the first device and based on the session information, the Gx communication session previously provided between the first device and the third device to establish a restored communication session.

A first device implementing a policy and charging rule function (PCRF) associated with an evolved packet core network, the first device comprising:

• a memory;
• and
• one or more processors, operatively connected to the memory, to:
• receive an authentication/authorization request from a second device associated with an Internet protocol Multimedia Subsystem (IMS) network,
• the authentication/authorization request being associated with a Gx communication session previously provided between the first device and a third device implementing a packet data network gateway (PGW) associated with the evolved packet core network,
• the authentication/authorization request being generated based on a request for communication via the evolved packet core network,
• attempt to identify the Gx communication session based on the authentication/authorization request,
• provide, to the second device, an authentication/authorization answer, based on the authentication/authorization request, when the Gx communication session is not identified,
• provide, when the Gx communication session is not identified, a reauthorization request to the third device,
• receive, based on the reauthorization request, an update request from the third device,
• the update request including session information associated with the Gx communication session previously provided between the first device and the third device;
• and
• restore, based on the session information, the Gx communication session previously provided between the first device and the third device to establish a restored communication session.